I'll try to keep it weird and mention a few no one has said yet:
Tree pollen after a spring rain.
Pine tar, the kind that comes in jars for nautical use
Diesel fumes of course, but I also like the atomized raw diesel of an engine trying to start.
Castor oil fumes from either a model airplane engine or a WWI vintage aircraft.
Sawdust of almost any kind. PIne, oak, cherry, mahogany, butternut come to mind.
Varnish, laquer thinner, boat houses.
The smell of a tobacco shop... I can only imagine what a drying shed smells like
Low tide has been mentioned. . salt air, that and fresh caught seafood.
Fresh cut grass or even a hay field after a hot, sunny day.
Likewise, rain on hot pavement